Improvement in illuminating vault-covers



T. HYATT. Illuminating Vault-Covers. No. 145,194. u`PatentedDec..v2,1873.

Wil-NE' EEE s: Imm-na.

UNITED STATES PATENT OFFICE THADDEUS HYATT, OF NEV YORK, N. Y., ASSIGNORTO ELIZABETH A. L.

-IIYATT, OF SAME ILACE.

IMPROVEMENT IN ILLUMINATING VAULT-COVERS.

Specification forming part ofLetters Patent No.145,194, dated December2, 1873; application led october 22, 1873.

OASE 19.

To all whom it may concern:

Be it known that I, TI-IADDEUS HYATT, of New York, in the county of NewYork and in the State of New York, have invented certain vnew and usefulImprovements in Pavement- Plates; and do hereby declare that thefollowing is a full, clear, and exact description thereof, referencebeing had to the accompanying drawing making a part of thisspeciication, in which- Figure l is a plan view of the upper side of -myimproved pavement plate or tile, and Fig.

2 is a vertical section of the same upon a line passing through thecenter of a row of illuminating-lenses.

Letters of like name and kind refer to like parts in each of theiigures.

My invention relates to the construction of illuminating pavementplates, tiles, A&c., in which the upper or bearin g surface is madedetachable; and it consists in a pavementplate which is covered upon itsupper side by a sheetmetal shell, that is held in place by means of theenlarged upper ends of illuminating-lenses and nuts placed upon thelower threaded ends ofthe same, substantially as and f or the purposehereinafter specitied.

In the annexed drawings, A represents a pavement-plate, constructed ofor from metal, wood, or other suitable material, and provided with anumber of light-openings, a. Upon the upper side ot the plate A isplaced a sheetmetal shell, B, which, at its edges, is extended downwardover the edges of said plate, and is provided with a series oflight-openings, that correspond in number, size, sha-pe, and position tothose of the lower plate, so as to permit of the insertion wit-hin eachof an illuminating-lens, C. As seen in Fig. 2, the upper end of eachlens C is enlarged horizontally, so as to give to it a bearing upon theupper side of the casing B, immediatelyT outside of the light-openings,while upon the body of said lens, near its lower end, is provided ascrew-thread, c, which receives a correspondingly-threaded nut, D. Asthus constructed, by screwing the nut D rmly upward against the lowerside of the plate A, the lens C will be drawn downward, and its headwill cause the shell D to be pressed iirmly against said plate.

It' desired, suitable bearing-buttons b may be attached to the upperside of the shell B, so as to relieve the lenses from abrasion bycontact with the feet of passengers, and a sheet of rubber or otherelastic material, E, may be placed between said shell and the plate A,for the purpose of lessening the sound caused by walking upon saidparts. A rubber washer, F, placed beneath each lens-head, willeffectually prevent the passage of water through the li ght-openin gs.

Vhen the plate A is constructed from wood, the nuts D may be made of thesame material,

and condensation of moisture upon .the lower side conned to the lowersurface of the lenses.

The pavement-pla-te described possesses all E required strength, isdurable and cheap, and

can be constructed and placed in position in THADDEUS HYATT.

Witnesses AMBRosn MONELL, CHARLES SPYR.

